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Westgate, John A; Shane, Philip A R; Pearce, Nicholas J G; Perkins, William T; Korisettar, Ravi; Chesner, Craig A; Williams, Martin A J; Acharyya, Subhrangsu K (1998): (Table 2) Average major-element composition of glass shards from Toba Tephra Beds in Sumatra, Malaysia, India, and the Indian Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.754823, In supplement to: Westgate, JA et al. (1998): All Toba Tephra Occurrences across Peninsular India Belong to the 75,000 yr B.P. Eruption. Quaternary Research, 50(1), 107-112, https://doi.org/10.1006/qres.1998.1974

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Project(s):
Coverage:
Median Latitude: 17.531656 * Median Longitude: 82.454183 * South-bound Latitude: 2.684500 * West-bound Longitude: 73.500000 * North-bound Latitude: 29.400000 * East-bound Longitude: 101.716700
Date/Time Start: 1988-06-15T00:00:00 * Date/Time End: 1988-06-15T00:00:00
Minimum Elevation: -2935.0 m * Maximum Elevation: -2935.0 m
Event(s):
121-758 * Latitude: 5.384067 * Longitude: 90.361167 * Date/Time Start: 1988-06-15T00:00:00 * Date/Time End: 1988-06-15T00:00:00 * Elevation: -2935.0 m * Penetration: 782.2 m * Recovery: 561.9 m * Location: Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 84 cores; 782.2 m cored; 0 m drilled; 71.8% recovery
Comment:
Positions are estimated from map. Analyses done on a Cameca SX-50 wavelength dispersive electron microprobe operating at 15 kV accelerating voltage, 20-mm beam diameter, 6nA beam current, and counting times of 20-55 s with Na and Al being analyzed first, as recommended by Morgan and London (1996). Standardization achieved by use of mineral and glass standards. Analyses recast to 100% on a water-free basis. All samples are rhyolites (IUGS classification, Le Bas et al., 1986).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2LATITUDELatitudeGeocode
3LONGITUDELongitudeGeocode
4AGEAgeka BPGeocode
5Age, standard deviationAge std dev±Westgate, John A
6Sample code/labelSample labelWestgate, John ADSDP/ODP/IODP sample designation
7Area/localityAreaWestgate, John A
8Silicon dioxideSiO2%Westgate, John AElectron microprobe (EMP)
9Silicon dioxide, standard deviationSiO2 std dev±Westgate, John AElectron microprobe (EMP)
10Titanium dioxideTiO2%Westgate, John AElectron microprobe (EMP)
11Globigerina angiporoidesG. angiporoidesWestgate, John AElectron microprobe (EMP)
12Aluminium oxideAl2O3%Westgate, John AElectron microprobe (EMP)
13Aluminium oxide, standard deviationAl2O3 std dev±Westgate, John AElectron microprobe (EMP)
14Iron oxide, FeOFeO%Westgate, John AElectron microprobe (EMP)total iron
15Iron oxide, FeO, standard deviationFeO std dev±Westgate, John AElectron microprobe (EMP)
16Manganese oxideMnO%Westgate, John AElectron microprobe (EMP)
17Manganese oxide, standard deviationMnO std dev±Westgate, John AElectron microprobe (EMP)
18Magnesium oxideMgO%Westgate, John AElectron microprobe (EMP)
19Magnesium oxide, standard deviationMgO std dev±Westgate, John AElectron microprobe (EMP)
20Calcium oxideCaO%Westgate, John AElectron microprobe (EMP)
21Calcium oxide, standard deviationCaO std dev±Westgate, John AElectron microprobe (EMP)
22Sodium oxideNa2O%Westgate, John AElectron microprobe (EMP)
23Sodium oxide, standard deviationNa2O std dev±Westgate, John AElectron microprobe (EMP)
24Potassium oxideK2O%Westgate, John AElectron microprobe (EMP)
25Potassium oxide, standard deviationK2O std dev±Westgate, John AElectron microprobe (EMP)
26ChlorineCl%Westgate, John AElectron microprobe (EMP)
27Chlorine, standard deviationCl std dev±Westgate, John AElectron microprobe (EMP)
28Sample amountN#Westgate, John A
29Water in rockH2O%Westgate, John AElectron microprobe (EMP)
30Water in rock, standard deviationH2O std dev±Westgate, John AElectron microprobe (EMP)
Size:
455 data points

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